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(No Model.)

F. SGHREIDT. MAGHINE FOR DRILLING CARRIAGE TOP IRONS.

No. 373,204. Patented Nov. 15, 1887.

WITNESSES j, 06, W

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UNITED STATES PATENT. OFFICE- FRANK. SOHREIDT, OF MANSFIELD, OHIO, ASSIGNOR TO THE SOHREIDT &

' MILLER COMPANY, OF SAME PLACE.

MACHINE FOR DRlLLlNGiCARRlAG E-TOP IRONS.

SPECIFICATION forming part of Letters Patent No. 373,204, dated November 15. 1887.

' Application filed January 12, 1886. Serial No.188,358. (No model.)

To all whom it may concern:

Be it known that I, FRANILSoHREIDn'of Mansfield, county of Richland, and State of Ohio, have invented a new and useful Improvement in Machines for Drilling Carriage-Top Irons, of whichthe following is a full, clear, and exact description, reference being bad to the accompanying drawings, making part of this specification.

My invention relates to a novel construction of machine for drilling the rivet-holes in the joints of carriage-tops and similar irons preparatory to uniting the parts of such joints, the construction and arrangement of parts of the machine being such that when the iron to be operated upon is properly clamped in its adjustable or sliding holder the operation of drilling the same for the connecting pin or rivet between the parts of the joint will be antomatic, as hereinafter explained.

In the accompanying drawings, Figure 1 is a perspective view of a machine embracing my improvements. of the clamp or holder and carriage for bolding and moving the iron to be operated upon up to the action of the drill, the cylindrical holder being shown in section; and Fig. 3 is a side elevation of the drill-holder on the lower end of the drill-shaft and the adjoining end of the adjustable holder or carriage and parts connected'therewith. Fig. 4 is a side elevation of one of the blanks after it has been a'cte upon by the drill.

A, A, and A represent horizontal bars or portions of a frame-work or support of any suitable construction, the upper bars, A and A, of which are provided with bearings a and a for a vertical shaft, B, having on its upper end a bevel or other suitable form of gear, through which a rotary movement isimparted to said shaft from any convenient drivingshaft, such as is indicated at B. On the lower end of the shaft B is secured a tubular bitholder, B, secured thereon by a set-screw, b, and provided in its lower end with a socket for the reception of and in which the drill-bit is to be secured in any usual or preferred manner.

Directly underneath and in line with the a shaft B and bit-holder B is a vertical rod, 0, mounted and adapted to slide in bearings a Fig. 2 is a plan View of parts and a on the frame bar A and provided between said bearings with an adjustable collar,

0, secured on said rod by means of a setscrew, 0, engaging the rod 0 and permitting the adj ustment of the collar up or down thereon: The collar 0 has a lug or car, 0', formed on it, to which the upper end of a connecting-rod, d, is pivoted, the lower end of said rod being pivoted to a treadle-lever, D, pivoted at or near the center of its length in a floor-bracket, d, and provided on one end with a treadle or footpiece, D, and at its other with an adjustable weight, DF, operating to lift the rod 0 when the foot of the attendant is removed from the t-readle D.

The'upper end of the rod O passes through atray or table, E, and has a removable cylindrical holder, F, secured to its upper end by a setscrew, f. provided with a horizontal slot or opening atf in its side, through which the end of the iron to be operated upon is insertedrounded end of the iron to be operated upon.

The upper end of this sleeve has a removable centering sleeve, 9, secured in it by a setscrew, 9, and having a central longitudinal bore conforming to the size of the drill employed.

The slot or opening f in the holder F has at one end a square shoulder at J", against which the shoulder of the knuckle to be operated upon abuts when the iron is properly placed in said holder. On the opposite side of the holder from said shoulder f is secured a bracket, h, in a horizontal ear, h, of which is pivoted a lever, I, bifurcated at its inner end, or provided near said end with an ear or arm, 1;, through which it is pivoted to the ear h, a curved arm, 71, extending thence around in front of the holder F when the lever is operated to grasp the iron, the end of the armt' serving as a jaw to grasp the iron at the j unction of the shank or bar with the rounded end 9 permitting its adjustment up and down on the rod 0. Upon this tray or table, upon suitable angle-irons and upright e e, is secured a curved bar or plate,K, the upper face of which, by the proper adjustmentof its support or the tray J, is brought into the same horizontal plane with the lower wall of the slotf in the holder F, so that the iron resting on said wall and the curved bar K will be held in a horizontal position. The left end of this bar or plate K has an angular bracket, is, secured to it, under which the outer end of the iron is swung in bringing it into position to be operated upon, said angular bracket serving to prevent vertical movement or displacement of the iron. The opposite end of the curved bar or plate K, which is brought into closer proximity with the holder F, has a lever, L, pivoted upon it, provided on its pivoted end with a cam or eccentric disk, L, which rests against and operates upon the lever I as the lever L is vibrated, moving the arm orjaw 11 of the lever I around into position to grasp and firmly hold the iron in the holder, as explained.

Aspring, m, secured at one end to the holder F and pressing at its opposite end against a pin, 1?, on the lever I, serves to move the lever and jaw i outward for releasing the iron when the lever L is moved in the reverse direction.

N is a tank or trough for receiving and carrying off the borings and drippings fromv the drill. and N indicates a tank or reservoir, from which a pipe or nozzle, n, extends downward, terminating over the centering-sleeve g, for supplying oil or other liquid to the drill, for keeping the latter from becoming overheated in operation, any suitable means being employed to regulate the flow of the liquid to the drill.

In practice I employ a saturated solution of sal-soda for keeping thedrill cool, having found it to be superior in cfiiciency to and much more economical than oil, which is ordinarily used for such purposes.

The operation will be readily understood. The attendant presses with his foot on the treadle D, drawing the rod 0, the holder F, and the supports connected therewith downward away from the drill. The iron to be operated upon is placed and secured therein, as explained, when the attendant removes his foot from the treadle, and the weight D serves to move the iron steadily up to the action of the drill until the perforation for the pivot is formed in the iron, when the attendant again presses on the treadle, withdrawing the holder, when the iron can be removed, a new one put in its place, and the operation repeated.

Having now described my invention, I claim as new 1. In a machine for drilling the knuckles or joints of carriage-top and other irons, the combination, with the drill shaft or holder, of the slotted cylindrical holder for said irons, secured to and moving with asliding rod or support, arranged and operating substantially as described.

2. In a machine for drilling thejoints oi'carriage-top and other irons, the removable cylindrical holder secured to a reciprocating support and provided with the slot for the irons to be operated upon, in combination with the clamping-bar for securing the irons in said holder, substantially as described.

3. The combination, with the sliding rod or support, of the slotted cylindrical holder, the pivoted arm or jaw for clamping the iron in said holder, and a support, K, for said iron, secured to and moving with the holder, substantially as described.

4. In a machine for drilling carriage-topironjoints, the slotted cylindrical and sliding holder, in combination with the clamping lever and the cam-lever and spring for actuating said clamping-lever, substantially as described.

In testimony whereof I have hereunto set my hand this 7th day of January, A. D. 1886.

FRANK. SOHREIDT.

Witnesses:

SAMUEL ll/IARRIOTT, EFFIE DOTY. 

